[OGRE-264] Fix GL cube map reflections with RTSS shaders.
[OGRE-264] Fix GL cube map reflections with RTSS shaders.

--HG--
branch : v1-9

jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre,jhu-lcsr-forks/ogre